Multi-section gain-lever quantum dot lasers
نویسندگان
چکیده
The modulation characteristics of multi-section gain lever quantum dot lasers are investigated in this paper. A 20-dB enhancement in the amplitude modulation efficiency is observed in a two-section quantum dot laser. Based on rate equation analysis a novel modulation response equation is derived to describe the device dynamics. In addition the dependence of the modulation efficiency enhancement and 3-dB bandwidth on the length of the modulation section is discussed. A conservative estimate of the gain lever value of 33 is derived from the measured results.
منابع مشابه
AFRL-RY-WP-TP-2011-1006 3-dB BANDWIDTH ENHANCEMENT VIA THE GAIN- LEVER EFFECT IN QUANTUM-DOT LASERS (POSTPRINT)
We investigate the small-signal modulation response of two-section, gain-lever, quantum-dot semiconductor lasers. A three-polemodulation function is derived from a 3-D set of rate equations, and a 70% 3-dB bandwidth enhancement is computed and experimentally realized in an undoped quantum-dot gain-lever laser under extreme asymmetric-bias conditions. Finally, it is demonstrated that the 3-dB ba...
متن کاملModulation Response of a Long-cavity, Gain- Levered Quantum-dot Semiconductor Laser -postprint
The gain-lever effect enhances the modulation efficiency of a semiconductor laser when compared to modulating the entire laser. This technique is investigated in a long-cavity multi-section quantum-dot laser where the length of the modulation section is varied to achieve 14:2, 15:1 and 0:16 gain-to-modulation section ratios. In this work, the gain-levered modulation configuration resulted in an...
متن کاملModulation response of a long-cavity, gain-levered quantum-dot semiconductor laser.
The gain-lever effect enhances the modulation efficiency of a semiconductor laser when compared to modulating the entire laser. This technique is investigated in a long-cavity multi-section quantum-dot laser where the length of the modulation section is varied to achieve 14:2, 15:1 and 0:16 gain-to-modulation section ratios. In this work, the gain-levered modulation configuration resulted in an...
متن کاملMechanism for enhanced wavelength tuning in gain-levered InP quantum dot lasers
Peak gain wavelength tuning via the gain-lever effect is demonstrated in segmented contact InP quantum dot Fabry–Perot lasers. A tuning range of 6.5 ± 0.1 nm was recorded in the lasing spectra of a 1.9 mm long broad area device operating at 22°C. The authors clarify the nature of the tuning mechanism and identify the critical material and device parameters that determine the limits of the wavel...
متن کاملY E a R S O F E X C E L L E N C E
The first self-assembled InAs quantum dash lasers grown by molecular beam epitaxy on InP (001) substrates are reported. Pulsed room-temperature operation demonstrates wavelengths from 1.60 to 1.66 μm for one-, three-, and five-stack designs, a threshold current density as low as 410 A/cm2 for single-stack uncoated lasers, and a distinctly quantum-wire-like dependence of the threshold current on...
متن کامل